Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
va cua » va chua, via cua, ca cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang x hoi. hieu ((ve cam) OR (ve cac)) ((xuc va) or (duc va)) hanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ((ve cam) OR (ve cac)) ((xuc va) OR (duc va)) hanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu ((ve cam) OR (ve cac)) ((xuc va) or (duc va)) hanh va cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ((ve cam) OR (ve cac)) ((xuc va) or (duc va)) hanh va cua te*.